Safety-adjuster for printing-films.



No. 666,087. Patented m. I5, mm.

a.- DAY. SAFETY ADJUST'ER'FUR PRINTING FIEMS.

(Application 810d Oct. 81, 1900.)

2 Shouts-Shut I.

(In Model.)

IN VE N TOH eiy'amznfiag WITNESSES ms NORRIS PETERS 00.. pnoroumouwar-(maven. a. c.

Patent ed Ian. l5, l90l.

B. DAY. SAFETY ADJUSTER FOR PRINTING FILMS.

(Application filed Oct. 31; 1900.)

2 Shaetv-Shdat 2.

(No Iodel.)

llllllllllllllllllfllfl I'l l Il lll Ill NITED STATES PATENT OFFICE.

BENJAMIN DAY Q OF WEST'HOBOKEN, NEW JERSEY.

SAFETY-ADJUSTER FOR PRINTING-FILMS.

SPECIFICATION forming part of Letters Patent No. 666,087, dated January15, 1901. Application fi1edOctober31, 1900. b'BI'ialNO. 35,030. onmodel.)

To a. whom it may concern:

Be it known that I, BENJAMIN'DAY, a citizen of the United States, and aresident of West Hoboken, in the county of Hudson and State of NewJersey, have invented new and useful Improvements in Safety-Adjustersfor Printing-Films, of which the following is a full, clear, and exactdescription.

My invention relates to adjustable holders or frames for printing-filmsor the like used in lithography and for similar purposes, and has forits object to provide a construction by which the operator is enabled toaccurately adjust and hold the framed film, to adjust, remove, andreadjust the film after inking or reinking with a certainty of obtainingaccurate shading, and to shift the frame minutely and accurately in twodirections, thereby throwing subsequent prints slightly out of registerwith the first print in such a way as to positively cause the subsequentprints to overlap, continue, or thicken the original print in such partsthereof as may be desired to produce darker tones of the original tint,thus varying the shading with a certainty of the results to be obtained.

The invention consists in certain features of construction andarrangement of parts, as will be described hereinafter and specificallypointed out in the claims.

Reference is to be had to the accompanying drawings, forminga part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a perspective view of the entire apparatus in position foruse. Fig. 2 is a detail plan of one of the supports for theprinting-film frame. Fig. 3 is a similar view of the other support. Ivation on line 4 4 of Fig. 2. Figs. 5 and 6 are sectional elevations onlines 5 5 and 6 6, respectively, of Fig. 3. Fig. 7 is a detail plan, onan enlarged scale, of a corner of the filmholding frame and theattachment for pivotally connecting said frame with its support. Fig. 8is an elevation, with parts in section, of a standardor clamp forconnecting the apparatus with a table or other support; and Fig. 9 is aninverted sectional plan on line 9 9 of Fig. 8.

The apparatus comprises two parallel guidebars A, secured by screws orotherwise to a Fig. 4 is a sectional elesupport B, which may be a tableor a draw ing-board and which is adapted to receive between theguide-bars A a lithographic stone 0 or a support for. paper, cardboard,zinc, copper, or other metal, or, generically speaking, the surface ormaterial on which the printing is to be done. The stone 0 or itsequivalent will generally be of a sufficient weight to render itsaccidental movement on the table B unlikely and special fasteningdevices dispensable.

On each side of the guide'bars A is mounted to slide a standard D,(preferably made of aluminium,) having an inner member D of considerablelength arranged to engage the guide-bar A, and a centrally-disposedshort outer member D provided with a recess D for the flush reception ofa clamping-plate E, and with perforations D into which fit pins E,projecting from said clam ping-plate. A screw F, extending through themember D serves to move the clamping-plate E to ward the inner member D,The standard is tubular, having a vertical bore D in which is verticallyadjustable and also mounted to turn a shank G, projecting downwardlyfrom a plate G, said shank being normally locked by a set-screw F. Theplate G has on one side a centrally-disposed upward projection G and onthe other side at about equal distances from the centerupwardly-projecting lugs G preferably tapered to an edge on their innersides, as shown in Fig. 8. Through the projection G passes a screw Fhavinga clamping ring or disk F which moves with the screw lengthwise,but may refrain from turning when brought against a resistance.

Between the lugs G and the clamping-plate F is adapted to be held across-bar H, preferably I-shaped in cross-section and made of aluminium,said bar serving for the attachment of the film-frame supports, as willbe described.

l The filmframe supports or registeringplates I I are alike in manyrespects, but differ in the construction of thepivots and the partsdirectly connected therewith. Each support has at its rear end arearwardly-tapering top plate 1 with an upward lug l and a downwardprojection 1 through which passes a screw F having a clamping-plate F ofthe same construction as the plate F i This plate h is adapted to engagethe rear surface of the cross-bar H. At the front'end of the top plate 1which has a central slot I arms I, having curved inner edges, areprojected downward at each side, these arms being adapted to bearagainst the forward face of the cross-bar H. From the arms 1 arms Iextend forwardly to connect with a cross member 1 having at its center aforward extension 1 from which rises a lug 1. Upon the arms I areadapted to slide the feet of an inverted-U-shaped frame J, in which issupported the transverse pivot K or K. The frame J has at its center abearing J and an arm J extending in the slot 1 of the plate 1 and at theend of said arm is provided another bearing J preferably split, so as tohave a resilient action. The bearing J is smooth and the bearing Jscrew-threaded. (See Fig. 6.) They receive the adjustingscrew L, havinga smooth portion L in the bearing J and provided atits ends with conicalrecesses to receive the trunnion-points of screws N N, secured to thelugs I and 1, respectively. Between the bearing J and the lug 1 agraduated milled wheel is secured on the screw L, and the indicationson-said wheel are adapted to register with a line or notch I on top ofthe lug 1. Between the hearing J and the lug I is located a sleeve P,shorter than the distance between said lug and bearing and surrounding aportion of the screw L. Said sleeve has an annular flange P, engaged byone end of a spring Q, the other end of which is in contact with theinnerface of the lug 1 The spring always presses the slide or frame Jforward, so as to prevent any lost motion of the bearing or nut JThe'pivot-pin K of the support I is mounted to slide in the frame J, ascrew R projecting into a recess K in the pin K both to limit thelongitudinal movement of the pin and to prevent it from turning.A-spring S is coiled around the pin K and bears with one end against theframe J, while its other end is fast to the pin. It will be understoodthat owing to this construction the pin K is capable of a yieldinginward movement. pivot-pin K of the other support I is likewise mountedto slide in the frame J, but instead of being yieldingly mounted, as thepin K, is screw-threaded at one end K3 preferably with the same threadas the screw L, said end passing loosely through smooth-bore openings inthe frame J and in an arm J secured by a screw J to an extension J ofsaid frame; Adjacent-to the other end the pin K has a recess K engagedby a screw R, secured to the frame J, to keep the pin from turning andto limit its sliding movement. Between the frame J and the arm J agraduated milled wheel 0 is arranged with suflicient looseness to becapable of rotation, yet without any appreciable play lengthwise of thepin K. The said wheel has an interior screw-thread engaging that of thepin. A

The

than the pin K, and the conically-pointed inner ends of the pins areadapted toenter sockets T at the ends of arms T projected fromattachment-plates T, having cornerpi'eces T to engage the adjacentcorners at the top of the frame U, which holds the printing-film V. Aflat spring W is secured to the att-achmentplate T upon the inside toengage the side of the frame U, and an L-shaped holding member X ispivoted to the plateT at X in proper position to engage the innersurface of the side member of the frame U. A screw F extends through thelower portion of the plate T and is provided with a head or plate F(similar to the heads F F adapted to engage the spring Wat its free endto clamp the plate T in position upon the frame U.

The operation and capabilities of the apparatus will be obvious from thepreceding description. The attachment-plates T are first secured to thecorners of the frame or holder U, and the construction of these platesallows of a slight vertical adjustment of the frame U at either side, asit is not absolutely necessary that the lower face of the member Xshould engage the side bar of the frame. The use of springs W preventslooseness and a marring of the frame U by the screw F The supports I I"being clamped in proper position on the cross-bar H, the socket T at thelefthand side of the frame is engaged with the pin K and the frame ispushed toward the left (the spring S allowing the pin K to yield) untilthe right-hand socket T can be engaged with the end of the pin K. Theframe U is now capable of a pivotal movement on the axis of the pins KK". To adjust the frame laterallythat is, lengthwise of the crossbarHthe wheel 0 is turned, thus shifting the pin K, and with it the frameU, the pin K following such movement, since the spring S keeps it incontact with the arm T of the plate T. To adjust the frame forward orrearwardthat is, toward or from the cross-bar Hthe wheels 0 aremanipulated, (of course both Wheels should be turned to the samedivision-,) which causes the frame J to slide forward or rearward,changing the position of the pins K K correspondingly. The screwadjustment allows the frame to be shifted very accurately and minutely.The adj ustability of the supports I I on the crossbar H makes theapparatus suitable for use with film-frames of different widths. Thelength of the bar H is sufficient to enable it to housed in connectionwith tables B of different widths. The pivotal connection'of the platesG with the standards D allows the bar H to be placed obliquely insteadof straight across, if desired, while the vertical adjustability of theplate G allows the film-frame U to be brought to'the properlevelrelatively to the impression-surface O.

The construction of the standards D as slides adjustable forward andrearward on the guide-bars A also enables the bar H to be placed atvarious angles to the table B and to be shifted forward or backward, asmay be desirable.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. An apparatus of the class described, comprising asupport or table provided with guides extending from front to rear,sliding standards movable along said guides, means for clamping thestandards in position, holding-plates pivotally connected with thestandards at the top, a cross-bar carried by said holding-plates, andsupports carried by the cross-bar and constructed to hold aprintingframe.

2. An apparatus of the class described, comprising a support or tableprovided with guides extending from front to rear, sliding standardsmovable along said guides, each standard having at one side an elongatedbearing member, and at the other side a centrally-located clampingmember, a cross-bar connecting the upper portions of said standards, andsupports carried by the cross-bar and constructed to hold aprinting-frame.

3. An apparatus of the class described,-

provided with standards attachable to a table or equivalent support, across-bar connecting said standards, supports carried by said cross-bar,a slide-frame movable on each support transversely of the cross-bar andprovided with an arm extending transversely of the cross-bar, theslide-frame and its arm each having a bearing, an adjusting-shaftjournaled in the support and passing through the bearings of theslide-frame, having an adjusting engagement therewith, and pivotpinsextending lengthwise of the cross-bar and carried by the saidslide-frames to hold a printing-frame.

4:. An apparatus of the class described, provided with standardsattachable to a table or equivalent support, a cross-bar connecting saidstandards, supports carried by said cross-bar, a slide-frame movable oneach support transversely of the cross-bar and provided at its centerwith an arm extending 5o transversely of the cross-bar, the slide-frameand its arm each having bearings one of which is SlIl 00th and the otherscrew-threaded,

a rotary adj ust-ing-screw journaled in the support and passing throughthe bearings of the slide-frame, a spring interposed between theslide-frame and the support to' keep the threaded bearing, in engagementwith the screw, and pivot-pins extending lengthwise of the cross-bar andadapted to hold a printing-frame, said pivot-pins being carried by thesaid slide-frames, one of them yieldingly, and the other adjustably formovement toward or from its mate,

5. An apparatus of the class described, provided with standardsattachable to a table or equivalent support, a cross-bar connecting saidstandards, supports carried by said cross-bar and provided with aliningpivot-pins, attachment-plates having sockets for the reception of saidpivot-pins, an arm pivotally connected with each attachmentplate andadapted to engage the inside of a printing-frame member, and a clampingdevice carried by said attachment-plate.

6. An apparatus of the class described, provided with standardsattachable to a table or equivalent support, a cross-bar connecting saidstandards, supports carried by said cross-bar and provided with aliningpivot-pins, attachment-plates having sockets for the reception of saidpivot-pins, an arm pivotally connected with each attachmentplate andadapted to engage the inside of a printing-frame member, a springextending 85 lengthwise of the attachment-plate and adapted to engagethe outside of said printingframe member, and a clamping device carriedby said attachment-plate and arranged to engage said spring.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

BENJAMIN DAY.

Witnesses:

J OHN LOTKA, EVERARD BOLTON MARSHALL.

